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NITED STATES JOHN A. GROSIION, OF NEW YORK, N.

Y., ASSIGNOR TO THE GROSHON HIGH DUTY PUMPING ENGINE COMPANY, OF SAME PLACE.

DIRECT-ACTING STEAM-ENGINE.

SPECIFICATION forming part of Letters Patent N0. 474,775, dated May 10, 1892.

Application filed February 21, 1890. Renewed December 24, 1890.

To ctZZ whom it may concern:

Be it known that I, J OHN A. GRosHoN, a citizen of the United States, and a resident of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Direct-Acting Steam-Engines, of which the following is a specification.

The invention relates to improvements in direct-acting steam-engines,'and particularly to-an improvement on the steam-engine described and'claimed in Letters Patent of the United States, No. 410,411, granted to me September 3, 1889; and it consistsin novel mechanism (hereinafter described and claimed) connected with the piston-rod, whereby said rod may have a force applied to it which will offer a resistance during the first portion of its stroke and assist it during the latter portion of its stroke.

I contemplate employing the invention in connection with compound steam-pumping engines of the Blake or other well-known types, and hence these classes of engines may be understood as affording examples of the application of the invention.

In the accompanying drawings the mechanism constituting the invention is represented as applied to the piston-rod of the engine, the steam and pumping cylinders having been omitted.

In the drawings, Figure 1 is a side elevation of a portion of the piston-rod with the mechanismconstituting the invention applied thereto and supported by girders, the said mechanism being shown in position to ofier a resistance to the piston-rod; and Fig. 2 is a transverse section of same on the dotted line 2 2 of Fig. 1, looking in the direction of the arrow.

A designates the piston-rod, of usual character, .having applied thereto the block B, which is held in position upon the rod by the threaded nuts 0 C and is provided at its upper and lower ends with the plates D D, which have a bearing against the plates or tramways E E, connected with or forming a part of the girders F F. The block Btravels with the piston-rod A and has 011 opposite sides the extensions G G, which receive the stud- Again renewed October 12, 1891. $erial No. 408,424. (No model.)

bolts H H, upon which the inner .ends of the levers I I have a bearing and are retained by nuts J J. The inner ends of one set of the levers I are bifurcated, as shown in Fig. 2, to receive the adjoining ends of the other set of levers I in order that when said levers are in position on the bolts H H the upper levers may be on the same vertical plane as the lower levers.

Between the nuts J and levers I and between the levers I and the extensions G are washers L. The outer ends of the levers I are collared on the crank-pins M at the outer ends of the arms N, which are mounted on the short shafts P P, sustained in the boxes Q Q, one box being secured to the upper girder F and the other box to the lower girder F. The shafts P extend entirely through the boxes Q, and sustain at their opposite ends the arms N, one of these arms being at each side of the upper girder F and one at each side of the lower girder F, and the pins M, above referred to, extend transversely outward in opposite directions from the outer ends of said arms N, the upper and lower pins being respectivelyin line with each other and being connected at opposite sides of the girders by the pairs of levers I, above described, which are coupled at their center by the bolts II on opposite sides of the block B, secured to the piston-rod A. Upon the outer ends of the lower pins M are secured by means of sleeves R and collars S the cylinders T T, one cylinder being at each side of the piston-rod, and upon the outer ends of the upper pins M are retained by means of sleeves V and collars WV the piston-rods X, which carry pistons and enter the cylinders T, as shown by dotted lines in the drawings. The upper end of each cylinder T is connected by means of a pipe Y with a source of pressure-such as water, air, or steamwl 1ich will act upon the upper side of the pistons within the cylinders and exert a force tending to keep the pistons at the lower end of the cylinders and the outerends of the 5 pairs of levers I close against the ends of said cylinders. The cylinders T and levers I being in the position illustrated in the drawings,

the pressure exerted upon the upper sides of the pistons within the cylinders would tend to keep the outer ends of the levers I close against the ends of the cylinders and resist the movement of the piston-rod A.

The operation of the invention may be fully understood by reference to Fig. 1, in which thepiston-rod A is shown in a position about to commence the first portion of its stroke. It will be observed that the movement of the rod A in the direction of the arrow or toward the pumps would cause a pressure through the block B on the .levers I, which would have the effect of forcing the outer ends of said levers I apart and turning the arms N and short then as soon as the piston-rod A has completed a further portion of its stroke the levers I I will be moved from said vertical line with each. other, and the pressure on the pistons will then act through said levers to assist the movement of the piston-rod A. The pressure in the cylinders T acts as a resistance to the movement of the rod Auntilsuch time as the rod has moved sufficiently to bring the levers I I into line with each other; but as soon as the rod A has carried the block B a little farther on its stroke, so as to pass the line of center through the levers I I, the pressureon the pistons within the cylinders T operates to force said pistons into the lower ends of thecylinders, thereby bringing the outer ends of the levers I I togetherand causing as a consequence the inner ends of said levers to aid in the movement of the piston-rod A in the same proportion as the pressure in the ing mechanism.

WVhat I claim as my invention, and desire to secure by Letters Patent, is

1. In combination with the piston-rod A of the engine, the levers I I, pivotally secured at their inner end to a block connected with said rod, the cylinder in connection with the outer end of one of said levers and a source of pressure, the piston-rod in connection with the outer end of the other of said. levers and carrying a piston within said cylinder, the pins M, supporting the outer ends of said levers I, and the arms N, adapted to rotate and carrying said pinsM, substantially as set forth.

2. The in ain pistonrod A, carrying the block B, combined with the levers I at each side thereof, the inner ends of said levers being pivotally secured to said block, thev cylinders T, in connection with the outer end of one set of said levers I and with a source of pressure, the piston-rods in connection with the outer end of the other set of said levers I and carrying pistons within said cylinders, and the arms N, mounted on the shafts P and carrying pins lVLWhlCll support the outer ends of the levers I, substantially as set forth.

Signed at New York, in the county of New York and State of New York, this 20th day of February, A. D. 1890.

JOHN A. GROSIION.

Witnesses:

CHAS. O. GILL, R. A. PORTEOUS. 

